Brake anchor



A. W. FREH SE March 1, 1932.

BRAKE ANCHOR Filed May 23, 1929 Patented 1,- 1932 UNI ED-STATE PATENT OFFICE ALBERT w. ranirsn, or narrow, mcnream'assicnon '1'0 GENERAL morons conrona'rron, or nn'rnorr, women, A cenronnrron or DELAWARE I ANGEOB Application filled Kay 23, 1929. Serial No. 365,384.

This invention relates to brakes and has been designed as an'improved friction brake for vehicles. p a

An object of the invention istoprovide an improved brake shoe which is to engage the brake drum and check its rotation.

Another object isthe construction of a shoe having an improved and simple anchorage, Another-object is to make a shoe wherein the distortion due to heat is reduced to a Other objects and advantages will be understood from the following description. j

In the drawings, Figure 1- is a view in-ele- 1 vation of the shoes assembled in, the drum; Figure 2 is a view in elevation of a part of -a shoe. Figure 3 is a view inside elevation of another part. Figure 4is a view on an enlarged scale of a portion-oi ashoewith the parts assembled. 'Figure 5 is a lsection on 5-5 ofFigurel.

Referring by reference characters to the drawings, numeral 7 representsthe flange of the drum, this being thedrum which is usually associated with the vehicle wheel, and 9 9 are the shoes which are to engage the surface, 7, and check the rotation of the drum. V Each shoe, 9, is comprised of a'beam or stiifening member, a flat plate and of curved shape. One end of each shoe is rounded, as at 13, and the other end is formed, as a flat disc, 15, of circular outline. This-disc portion, 15, is to serve as an anchor. In this way the usual anchoring pin may be avoided. On the outerperiphery of the beam ortion, 11, are a plu rality of radial lugs, 1 Theselugs are received .in openings in the inner flat portions, 19, of a thin metal ribbon having, alternating with parts 19, outer flatv portions, 21, with angular parts, 23, therebetween. The lugs 17, after 'bem ot the rib on are headed to serve as a rivet to, secure the ribbon to the beam, 11L A car g strip, 25, preferably of thesame thic ess asthe ribbon, is riveted to the parts,

21, by rivets, 27. -These rivets may alsoserve tosecure the lining, 28. v

The adjacent rounded ends,'13, are

by the opposite wedged surface, 29, of arake 11. The member, 11, is

projected through the. opemngs' operating member, 31; This operating memher is slidable on a pin, 33, and in sosliding,

I it expands the adjacent ends of the shoes, 9, into engagement with the drum in an obvious manner. The member, 31, is also free to rotate about-pin, 33, with, the result that the applied pressure on the two shoes may be equalized. 37 is a-hollow block, which may be secured by fastening means, 39, in fixed position. Within the block there is a wedgeshaped member, 41, having surfaces'43 and 45. The recess -w'ithin the block receives bearings, 47, which are slidable on the Sui-- faoes, 43 and '45. 'The bearings have openings, .51, communicating with recesses, 53,

shaped and dimensioned to correspondwith the discs, 15. The planes of surfaces, 43 and 45, are substantially at right angles to the direction of thrust at the anchors of, the brake shoes. A flat spring, 55, has its ends engaging the two bearing members,47, and isheld in position by a pin, 57 The spring normally presses the two bearing members, 47, outwardly and into contact withlimiting surfaces, 59.

vious- Asv the wedge member 31, is moved inwardly in, a radial direction by the en-. gagement of a member, 61, in a slot, 63, the

shoes are spread apart and rotate about their disc anchors, 15, into contact with the drum.

The operation ofthe brake will be ob- I The heat developed in part 25is not readily transmitted to the beam member, 11, since the connection between these parts by ribbon member-is such as to provide for free radia tiom 'The sliding anchorage permits the 7 shoes to readiy conform to the shape of the drum. Furthermore, if the shoe beam becomes distorted to any extent, from the infiuence of heat, the sliding anchorage is a more advantageous arrangement than a fixed anchorage. cur

with the drum in the region adjacent the 7 brake applying part. Asa result ing anchorage it possible, even of the slidunder such Ifthe anchorage were fixed, the I shoe wouldtend-to fail to contact circumstances, for the member, 47,- to slide 7 inwardly the tension of spring, 55,.

im- Us to provide abetter'and more uniltorm contact with the drum even in the case of shoe distortion. Iclaim: r 1. In a brake, a brake shoe including a fiat r beam, said beam having at one end a flat disc, circular in outline, a socketmember shaped to receive said disc to provide anchorage'for said shoe.

2. In combination, a pair of shoes, means 1 to separate one pair of adjacent ends of said shoes, a block fixed in position adjacent the other pair of adjacent ends, said block havin angular faces, bearings in said block slidably engaging said faces, saidshoes having .15 at their opposite ends flat discs, circular in outline, and said bearings having recesses shaped to receive said discs. I

3. A brake shoe having a curved lining carrying'flange and a flat curved beam, the plane of the beam being at right angles to y the plane of the lining carrying flange, an angularly bent metallic ribbon having alter-' nating spaced surfaces engagingthev outer edgeof' the beam and'the'inner surface of the flange and means to secure said ribbon to said flange and the beam, s'aid shoe having an anchored end in the form of a disc, circular in outline, said disc being formed on the end 1 ofthe beam of said shoe. 7 9 4. In combination, a brake shoe having at one end a flat anchoring disc, circular in outline, a bearing having a recess to receive saiddisc, a fixed block Ihavinga surface to slidably receive said bearing, and means to limit the sliding movement of said bearing on said surface. H 5. The invention defined by claim 4', said last named surface being in a plane, substan-- tially at right angles to the thrust of said 40 shoe. V

6. In combination, a brake shoe havingat one end a fiat anchoring disc,circular in outline, abearing having a recess to receive said disc, a fixed block having a surface to slidably receive said bearing, said surface being substantially at right angles to the thrust of said shoe, means in said block to limit the I movement of said bearing member, and yielding means normally exerting pressure 7 on said bearing in adirection to move said bearing toward said limiting means;

In testimony whereof'I aflix my signature.

- "ALBERT: W. FREHSE. 

